A Web Query System for Heterogeneous Government Data

A Web Query System for Heterogeneous Government Data

Nancy Wiegand (University of Wisconsin - Madison, USA), Isabel F. Cruz (University of Illinois at Chicago, USA), Naijun Zhou (University of Wisconsin - Madison, USA) and William Sunna (University of Illinois at Chicago, USA)
Copyright: © 2005 |Pages: 19
DOI: 10.4018/jegr.2005040104
OnDemand PDF Download:
No Current Special Offers


This paper describes a Web-based query system for semantically heterogeneous government-produced data. Geospatial Web-based information systems and portals currently are being developed by various levels of government along with the GIS community. Typically, these sites provide data discovery and download capabilities but do not include the ability to pose DBMS-type queries. One of the main problems in querying distributed government data sources is the difference in semantics used by various jurisdictions. We extend work in schema integration by focusing on resolving semantics at the value level in addition to the schema or attribute level. We illustrate our method using land use data, but the method can be used to query across other heterogeneous sets of values. Our work starts from an XML Web-based DBMS and adds functionality to accommodate heterogeneous data between jurisdictions. Our ontology and query rewrite systems use mappings to enable querying across distributed heterogeneous data.

Complete Article List

Search this Journal:
Open Access Articles
Volume 18: 4 Issues (2022): 2 Released, 2 Forthcoming
Volume 17: 4 Issues (2021)
Volume 16: 4 Issues (2020)
Volume 15: 4 Issues (2019)
Volume 14: 4 Issues (2018)
Volume 13: 4 Issues (2017)
Volume 12: 4 Issues (2016)
Volume 11: 4 Issues (2015)
Volume 10: 4 Issues (2014)
Volume 9: 4 Issues (2013)
Volume 8: 4 Issues (2012)
Volume 7: 4 Issues (2011)
Volume 6: 4 Issues (2010)
Volume 5: 4 Issues (2009)
Volume 4: 4 Issues (2008)
Volume 3: 4 Issues (2007)
Volume 2: 4 Issues (2006)
Volume 1: 4 Issues (2005)
View Complete Journal Contents Listing